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Mathematical Problems in Engineering
Volume 2014, Article ID 574610, 10 pages
http://dx.doi.org/10.1155/2014/574610
Research Article

Channel Estimation and Information Symbol Detection for DS-UWB Communication Systems

1School of Control Science and Engineering, Shandong University, Jingshi Road 17923, Jinan 250061, China
2School of Electrical Engineering, University of Jinan, Jinan, Shandong 250022, China

Received 16 December 2013; Accepted 14 February 2014; Published 27 March 2014

Academic Editor: Xiaojie Su

Copyright © 2014 Wei Wang and Chunyan Han. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The UWB channel estimation and multiuser detection problem are investigated. The information symbol and channel parameter are considered as unknown variables. The multiuser detector and UWB channel estimator are designed jointly. For symbol detection, the one-step predictor of channel parameter is used and the estimation error is treated as a multiplicative noise; then a Riccati equation and a Lyapunov equation will be needed. If the transmitted symbols are uncorrelated and identically distributed random variables with zero mean and unit variance, only a Riccati equation needs to be solved. For UWB channel estimation, the one-step predictor of information symbol is used and the estimation error is also considered as a multiplicative noise. The solutions to the above two problems are obtained by solving a couple of Riccati equations together with two Lyapunov equations.